Lexicon DD-8 - Manual (Page 8)

DD-8 Power Amplifiers
Operation Manual 8
Back Panel
1. Bus Output
Provides a line-level RCA connector loop/passthru output for connecting multiple DD-8 amplifiers in a
system utilizing a single bus input signal.
If the DD-8 is used as a single zone amplifier and the input signal is connected via the Bus Input, that
signal can be output via this pair of RCA connectors to additional DD-8 amplifiers connected in the
same manner.
NOTE: The number of DD-8 amplifiers that can be connected in this manner is limited by the
output voltage of the signal source device driving the bus input as it must support the total
impedance of all of the bussed devices.
2. Bus Input
Provides a line-level RCA connector input to simultaneously feed all speaker output channels utilizing
a single bus input signal.
When the DD-8 is used as a single zone amplifier, all channels can be driven using only the bus input
without the need for connection to each channel’s local input individually. If the bus input is used with
the DD-8 configured for stereo operation, the Left input signal will be routed to all four Left speaker
outputs and the Right input signal will be routed to all four Right speaker outputs.
If the bus input is used with the DD-8 configured for all mono operation, either the Left or Right Bus
Input RCA connector can be used to feed all eight speaker outputs. (See the section on “Stereo/Mono
Selection” for more information.) In this case, using only one input connector will attenuate the gain
by 6dB. A “Y-adaptor” RCA cable can be used at the input to maintain full gain if desired.
BaSIc operatIon
WARNING: Do not connect the outputs
of one channel to the outputs of other
channels or to other amplifiers.
CAUTION: Never make or break connections
to the DD-8 unless the DD-8 and all
associated components are powered off!
2
1 3 4 7 11 10 10
6 9 5 8
1. Bus Output
2. Bus Input
3. Local Inputs
4. Output Level Controls
5. Stereo/Mono Selection
6. Local/Bus Selection 7. Speaker Outputs
8. Signal Sense On/Off
9. Power Save On/Off
10. Trigger In/Out
11. AC Main Power Connector